Re: MAX Machine PLA

From: Segher Boessenkool <*segher_at_kernel.crashing.org*> Date: Sun, 31 Jul 2016 09:55:17 -0500 Message-ID: <20160731145517.GD12697@gate.crashing.org> · segher_at_kernel.crashing.org

On Sun, Jul 31, 2016 at 04:48:15PM +0200, Michał Pleban wrote:
> > D0..D3 are inputs too, and D8..D11 are tristate outputs.  There is no
> > real 4066 functionality I think (only one direction is needed).
> 
> That would mean that the color RAM would be write-only, unlike on the
> C64. Is that really the case?

Oh, hrm, I didn't think of that, whoops.  I doubt the 6703 connects them
though (a la 4066, really switches them together); it has access to the
R/#W signal so I bet that figures in, it just drives one side at either
time.

Someone decap one already!  For science!  :-)

Segher

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